6689290 has 8 divisors (see below), whose sum is σ = 12040740. Its totient is φ = 2675712.

The previous prime is 6689281. The next prime is 6689303. The reversal of 6689290 is 929866.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6365529 + 323761 = 2523^2 + 569^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334455 + ... + 334474.

Almost surely, 2^6689290 is an apocalyptic number.

6689290 is a deficient number, since it is larger than the sum of its proper divisors (5351450).

6689290 is a wasteful number, since it uses less digits than its factorization.

6689290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668936.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 6689290 is about 2586.3661767043. The cubic root of 6689290 is about 188.4198591285.

The spelling of 6689290 in words is "six million, six hundred eighty-nine thousand, two hundred ninety".